SPSM vs TAN overlap - what they share and where they differ
SPSM and TAN share 1.2% of their weight across 5 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
SPSM and TAN
1.2%
5 shared positions
SPSM
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Reported positions cover 100% of the fund, 599 positions · Jun 30, 2026
Top 10: 5.9%·Holdings of SPSM
TAN
Invesco Solar ETF
Reported positions cover 100% of the fund, 31 positions · May 31, 2026
Top 10: 65.2%·Holdings of TAN
Reported positions cover SPSM 100%, TAN 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
TAN vs SPSM side by side
SPSMState Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
599
stock positions reported to the SEC
98.5% of its weight is in 594 names TAN does not hold
TANInvesco Solar ETF
31
stock positions reported to the SEC
74.1% of its weight is in 26 names SPSM does not hold
Where each fund's weight sits
Largest sectors for both funds
The widest gap is Technology: TAN has 32.1 points more of it.
The figures side by side
| SPSM | TAN | |
|---|---|---|
| Filing date | Jun 30, 2026 | May 31, 2026 |
| Stock positions reported | 599 | 31 |
| Weight of the ten largest | 5.9% | 65.2% |
| Largest position | FORM 0.7% | FSLR 11.7% |
| Held alone | 594 positions, 98.5% | 26 positions, 74.1% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In SPSM | In TAN | Counted |
|---|---|---|---|
| ENPHEnphase Energy Inc | 0.35% | 8.75% | 0.35% |
| HASIHA Sustainable Infrastructure Capital Inc | 0.27% | 3.46% | 0.27% |
| CWENClearway Energy Inc | 0.22% | 2.51% | 0.22% |
| SEDGSolarEdge Technologies Inc | 0.19% | 6.32% | 0.19% |
| RUNSunrun Inc | 0.17% | 4.83% | 0.17% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in SPSM
Only in TAN
Questions people ask
Is SPSM the same as TAN?
1.2% of their weight sits in the same 5 holdings. SPSM also reports FORM, VSAT, MOH, which the other does not. TAN also reports FSLR, NXT, ENLT, which the other does not.
How is the overlap between SPSM and TAN measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of SPSM and 100% of TAN, so the number cannot exceed the smaller coverage.
Which holds more, TAN or SPSM?
SPSM reports 599 stock positions and TAN reports 31. 98.5% of SPSM's weight sits in names TAN does not hold, and 74.1% of TAN's weight in names SPSM does not hold. The ten largest positions are 5.9% of SPSM and 65.2% of TAN.
How do SPSM and TAN differ by sector?
The widest gap is Technology: TAN has 32.1 points more of it. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Other pairs with these funds
SPSM against other funds in the table
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.